Roll bending device



Oct. 5, 1965 E. E. cRlsT ETAL ROLL BENDING DEVICE 2 SheetsSheet 1 Filed Sept. 24, 1965 lllllll l1 llwlxll INVENTOR S Jazcge uh/ @v/f TTORNEYS Rayma' Oct. 5, 1965 E. E. cRlsT ETAL 3,209,679

ROLL BENDING DEVICE Filed Sept. 24, 1965 2 Sheets-Sheet 2 INVENTORS fjazzef @zy/S Rag/maze@ Jarzgge C@ ga/WA TTORNEYS United States Patent O 3,209,679 ROLL BENDING DEVICE Elmer E. Crist, Beloit, Wis., and Raymond J. Tangye, Rockton, lill., assignors to Beloit Corporation, Beloit, Wis., a corporation of Wisconsin Filed Sept. 24, 1963, Ser. No. 310,985 15 Claims. (Cl. 1D0- 170) This invention generally relates to an improved calender apparatus and more particularly to calender apparatus having an improved roll bending means.

In order to provide a suitable nish to sheets of paper, plastic, or coated paper, it was necessary to either provide calender roll with a iixed crown or a means to bend the calender roll to provide the necessary crown, The lixed crown had a major drawback of not being versatile and therefore uneconomical when a variety of operations were to be performed. Therefore, calender rolls that were bendable afforded more versatility. Other bending means are inadequate to provide rapid fine adjustments. Also, the prior roll bending devices have a tendency to cock the calender roll bearings which is detrimental to the efficient operation of the calender. The roll bending device of the present invention allows line adjustment of the calender roll crown and substantially eliminates bearing cockmg.

Therefore, it is an object of the present invention to provide a calender with an improved roll bending or crowning device.

It is another object of the present invention to provide an improved roll bending or crowning device using a plurality of bellows to adjust the bend in a roll.

It is another object of the present invention to provide a pair of adjacent calender rolls having each end journaled in a bearing with a pair of roll bending devices connected to the bearings at each end of the calender rolls.

It is further another object of the present invention to provide a calender stack having a pivotal upper calender roll and an adjacent lower calender roll with each roll having outboard bearings connected to two stacks of bellows attached to the rolls to simultaneously act on both rolls to increase or decrease the crowns thereof.

It is still another object of the present invention to provide a roll bending device with a stack of bellows connected to the calender roll to either increase or decrease the crown thereof.

It is another object of the present invention to provide a bellows means for effectively pivoting a roll.

Other features and objects of the present invention will become apparent to those skilled in the art after a careful consideration of the following detailed description when considered in conjunction with the accompanying drawings wherein like reference numerals and characters refer to like and corresponding parts throughout the several views.

On the drawings:

FIGURE 1 is a partial front elevational view of a calender stack constructed in accordance with the principles of the present invention;

FIGURE 2 is a side elevational view of the calender stack Constructed in accordance with the principles of the present invention;

FIGURE 3 is a partial longitudinal cross-sectional view of the roll means constructed in accordance with the principles of the present invention; and

FIGURE 4 is a schematic illustration of a roll bending bellows stack device constructed in accordance with the principles of the present invention.

As shown on the drawings:

The present invention has a calender stack with two adjacent calender rolls that are bendable. The calender rolls are journaled at both their ends through main bearice ings that are connected to a calender stack support. A swing arm is connected to both ends of the upper calender roll. The swing arms each have an adjustable lever means extending downwardly therefrom to a bellows pivot means wherein a pressure bellows is provided on opposite sides of the lower end of the lever arm to move the lever arm in proportion to the amount of pivot desired for the upper calender roll. The pivot means for the upper calender roll is provided with suitable stop means and suitable lockup stop means.

Each calender roll is also journaled at both ends to outboard bearings which are outwardly spaced from the main bearings. The outboard bearings at each end are at tached to a roll bending device. The roll bearing device has a pair of parallel stack bellows with one stack of bellows being on each side of the outboard bearings. Each bellows stack has a first and second vertical actuation plate or bar that are parallel and vertically relatively movable to each other. Each vertical actuation plate or bar has a plurality of horizontal support bars that extend towards the other Vertical actuation bars. The horizontal support bars of the rst actuation bar alternate with and extend between the horizontal support bars of the second actuation bar. A plurality of lirst bellows are placed below the rst support bars between the first and second support bars and a plurality of second bellows are placed below the second support bars between the second and first support bars. The irst bellows are utilized to' lower the rst actuating bar and raise the second actuating bar whereas the second bellows are utilized to lower the second actuating bar and raise the first actuating bar.

The rst actuating bar is attached to the upper calender roll outboard bearing and the second actuating bar is attached to the lower calender roll outboard bearing'. The relative movement of the two actuating bars, which move in opposite directions, causes a force to be exerted on the shafts of the upper and lower calender rolls to bend" the rolls to increase or decrease the crown thereof. The bend or crown in each roll may be effectively adjusted, as desired, during the operation of the calender.

Referring to FIGURES l and 2 there is illustrated a two roll calender stack 8, constructed in accordance with the principles of the present invention, receiving a paper web 9 from a paper machine dryer and being guided to the calender stack by a guide roll 10 connected to a dryer post 11. The two roll calender stack has a pair of upwardly extending longitudinally spaced calender supports 12 and 13. The calender supports have respectively attached thereto first upper main bearings 14 and 16 and second lower main bearings 17 and 18. Journaled through the upper bearings is a rst upper calender roll 15 and jour-4 naled through the lower bearings is in adjacent second lower calender roll 20. The rst upper calender roll has a shaft 19 with both ends of the calender roll extending beyond the rst main bearings 14 and 16 and with botl ends journaled in iirst outboard bearing means 21 and 22 respectively. The second lower calender roll has a shaftI 23 with both ends thereof extending beyond the second main bearings 17 and 18 and with both ends journaled in second outboard bearing means 24 and 26. The first and second bearing means are connected to roll bending means 27 and 28 which will be described hereinafter in greater detail.

The calender stack supports 12 and 13 have calender covers 29 and 31 respectively, with each calender cover having a cover plate 32. The covers 29 and 31 are attached to the calender supports by suitable brackets 33.

Adjacent the calender supports 12 and 13 and suitably attached thereto are pivot spacer stands 34 and 36. The pivot spacer stands have pivot pins 35 in the upper portion thereof that pivotally mount pivot means 37 and 38 respectively thereto, as will be described hereinafter in greater detail. The pivot means are suitably attached to the upper calender roll to pivot the upper calender roll towards and away from the lower calender roll.

Positioned adjacent the off running side of the lower calender roll is a suitable doctor means 39, such as an air or blade doctor, and positioned adjacent the onrunning side of the lower calender roll is a bendable web guide roll 41, such as a Mount Hope Roll.

The pivot means 37 and 38 have horizontally extending swing arms 42 and 43 that are attached to the respective first main bearings 14 and 16. Lever arms 44 and 46 are attached respectively at their top ends to the swing arms 42 and 43 and extend downwardly therefrom to their bottom ends which are connected to pivot actuation means 47 and 48 and the lever arm has respective lockup means 49 and 51 and ratchet stop means 52 and 53 connected to pivot supports.

Referring to FIGURE 3 there is a partial cross-sectional illustration of the pivot means 37. It is of course understood that the pivot means 38 is identical thereto. The lower end 54 of the lever arm 44 has a circular plate 56 connected to each side thereof and extending parallel and concentric with each other. Attached to the circular plate and extending axially therefrom are cylindrical bellows 57 and 58 respectively. The bellows are suitably connected to the sides of the pivot supports by bolts 59 and nozzles 61 and 62 respectively. The nozzles suitably communicate with the interior of the bellows 57 and 58 through pivot support inlets 63 and 64. The inlets 63 and 64 may have suitable air hose (not shown) connected thereto to deliver a predetermined amount of pressurized air to the bellows 57 and 58.

Spaced above the circular plates 56 and extending from opposite sides of the lever arm 44 are stop surfaces 66 and 67. The right stop surface 67 cooperates with an adjustable stop bolt 68 which is threaded through one side of the pivot support 34, and the left stop surface 66 cooperates with the ratchet stop means S2. The ratchet stop means has an adjustable stop bolt 69 which is threaded through the other side of the pivot support 34 and is adjusted by a ratchet handle 71. The stop bolts 68 and 69 limit the movement of the lever arm 44.

When the calender stack is in operation, the nip pressure between the upper and lower calender rolls may be increased or decreased by increasing and decreasing the air pressure supplied to the bellows 57 and 58. If it is desired to decrease the nip pressure, the lower arm 44 is moved towards the right side wall of the pivot support 36 by increasing the pressure in bellows 57. This movement pivots the upper roll 15 about the pivot pin 35 away from the lower roll 20. Likewise, if it is desired to increase the nip pressure, the pressure in the bellows 58 is increased and the lever arm moves towards the left side wall to pivot the upper roll towards the lower roll.

A predetermined distance between the swing arm and the stop surfaces 66 and 67 is located a lockup stop means 49 having a stop bolt 72 threaded into the lever arm. The Stop bolt 72 extends from the lever arm towards the left side wall of the pivot support and has its end spaced a predetermined distance from the inner surface of the side wall. A pivot support hold means 73 is pivotally mounted'to the left side wall and has a protruding surface 74 that is adapted to contact the end of the stop bolt 72 when placed in a hold position. The pivot hold means is pivoted by a handle 76 suitably connected thereto.

When the calender stack is shutdown, the upper calender roll is pivoted away from the lower calender roll and out of contact therewith because unnecessary stationary contact between the two rolls decreases the useful life thereof. The -two rolls are maintained apart by placing the hold means 73 in contact with the stop bolt 72 to prevent movement of the lever arm towards the left side wall.

Referring to FIGURES 1, 2, and 4, the roll bending devices 27 and 28 are identical to each other and are placed on opposite ends of the calender rolls 15 and 20. Each roll bending device has two bellow stacks 77 and 78. The bellow stacks 77 and 78 are vertical stacks of vertical force exerting bellows 79 and extend parallel to each other. The bellow stacks 77 and 78 have respectively first actuation plate means 81 and 82 and second actuation plate means 83 and 84 that are parallel to each other. The first actuation plates 81 and 82 are interconnected by spacer means 86 positioned above the first calender roll and the second actuation plates 83 and 84 are interconnected by spacer means 87 positioned below the second calender roll 20. The first and second actuation plates of the respective stacks 77 and 78 are mounted to move vertically and relative to each other. The first actuation plates 81 and 82 are positioned on opposite sides of and are suitably attached to the first calender roll outboard bearing by respective support means 88 and 89, and the second actuation plates 83 and 84 are positioned on opposite sides of and are suitably attached to the second calender roll outboard bearing by respective support means 91 and 92. Each of the supports 88, 89, 91 and 92 have arcuate inner surfaces that are attached to approximately half the outer circumference of their outboard bearings.

The first actuation plates 81 and 82 each have a plurality of spaced parallel first rectangular support members 93 horizontally extending therefrom towards their respective second actuation plates 83 and 84. Likewise, the second actuation plates 83 and 84 have a plurality of spaced parallel second rectangular support members 94 horizontally extending therefrom towards their respective first actuation plates 81 and 82. The first and second horizontal supports of each bellows stack are arranged to alternate with each other. A plurality of first vertically expanding bellows 96 are attached with each first bellows having its upper end on the bottom of a first support member and its lower end on the top of the adjacent second support member. A plurality of second vertically expanding bellows 97 are attached with each second bellows having its upper end on the bottom of a second support member and its lower end on the top of the adjacent first support member. The first and second bellows are mounted to expand and exert vertical forces.

A first pressure manifold pipe 98 has a plurality of first branch conduits 99 extending therefrom and suitably connected to the first support members 93. The first support members 93 have suitable passageways or means (not shown) to communicate the first branch conduits 99 with the interior of the bellows 96.

A second pressure manifold pipe 101 has a plurality of second branch conduits 102 extending therefrom and suitably connected to the second support members 94. The second support members 94 have suitable passageways or means (not shown) to communicate the second branch conduits 102 with the interior of the bellows 97.

A suitable source (not shown) of pressurized fluid i.e. air, is connected to the first and second manifolds to selectively deliver the desired pressurized fiuid thereto.

In operation, the pressure in the first and second bellows is set at a predetermined level. When it is desired to increase the crown of the first and second calender rolls, an upward force is exerted on the first outboard bearings 21 and 22 and a downward force is exerted on the second outboard bearings 24 and 26. These forces are exerted by increasing the pressure in the first bellows to expand the first bellows. Expansion of the first bellows exerts an upward force on the first support members and a downward force on the second support members to move the rst actuation plate upwardly and the second actuation plate downwardly. Likewise, if it is desired to decrease the crown of the rolls, a downward force is exerted on the first outboard bearings and an upward force is exerted on the second outboard bearings. These crown decreasing forces are exerted by increasing the pressure in the second bellows to expand the second bellows. Expansion of the second bellows exerts an upward force on the second support members and a downward force on the first support members to move the second actuation plate upwardly and the first actuation plate downwardly.

It is of course understood that the expansion of the first bellows or the second bellows requires a pressure differential therebetween which can be brought about by increasing the pressure of either, decreasing the pressure of either, or combinations thereof.

Further, it is understood that although the number of first bellows is shown to equal the number of second bellows in each bellows stack, the relative number of first and second bellows does not have to be equal. Also, there can be more or less bellows than are illustrated by the drawings. The number of bellows being dependent on the type of adjustments desired for a particular type of operation and roll.

It will be understood that the above embodiment of our invention has been used for illustrative purposes only and that other modifications and variations in the present invention may be effected without departing from the spirit and scope of the invention as set forth in the herein appended claims.

We claim as our invention:

l. A calender stack having a first calender roll and a second adjacent calender roll journaled in main bearings in a calender support comprising:

first bearing means journaled to each end of the first roll and spaced from said main bearings,

second bearing means journaled to each end of the second roll and spaced from said main bearings,

a bellows stack mounted at each end of the first and second rolls,

said bellows stack having a first actuation means and a second actuation means extending parallel to each other, at least one first support extending towards the second actuation means from the first actuation means,

at least one second support extending towards the first actuation means from the second actuation means,

said first support alternating with said second support,

at least one first and at least one second bellows mounted between said first and second supports to expand in a direction parallel to the first and second actuation means to move the first and second actuation means relative to each other,

a first attaching means connecting the first actuation means with the first roll bearing,

a second attaching means connecting the second actuation means with the second roll bearing,

whereby when the first bellows is expanded, the first actuation means is moved in one direction and the second actuation means is moved in the opposite direction to bend the first and second rolls in opposite directions and when the second bellows is expanded, the second actuation means is moved in the one direction and the first actuation means is moved in the opposite direction to bend the first and second rolls in opposite directions.

2. A calender stack having a first calender roll and a second adjacent calender roll journaled in main bearings in a calender support comprising:

rst bearing means journaled to each end of the first roll and spaced from said main bearings,

second bearing means journaled to each end of the second roll and spaced from said main bearings,

one pair of bellows stacks mounted at one end and another pair of bellows stacks mounted at the other end of the first and second rolls,

each pair of bellows stacks having two bellows stacks,

each bellows stack having a first actuation means and a second actuation means extending parallel to each other,

a plurality of spaced first supports extending towards the second actuation means from the first actuation means,

a plurality of spaced second supports extending towards the first actuation means from the second actuation means,

said first supports extending between said second supports and alternating therewith,

a plurality of first and second bellows alternately mounted between said first and second suppots to expand in a direction parallel to the first and second actuation means,

a first bearing attaching means connecting the first actuation means with the first roll bearing means,

a second bearing attaching means connecting the second actuation means with the second roll bearing means,

whereby when the first bellows are expanded, the first actuation means is moved in one direction and the second actuation means is moved in the opposite direction to bend the first and second rolls in opposite directions and when the second bellows are expanded, the second actuation means is moved in the one direction and the first actuation means is moved in the opposite direction to bend the first and second rolls in opposite directions.

3. A calender stack having a first upper calender roll and a second lower adjacent calender roll journaled in main bearings in a calender support comprising:

first bearing means journaled to each end of the first roll and spaced from said main bearings,

second bearing means journaled to each end of the second roll and spaced from said main bearings,

two pairs of bellows stacks,

one pair of bellows stacks mounted at one end and the other pair mounted at the other end of the first and second rolls,

each pair of bellows stacks having two bellows stacks extending parallel to each other and having the first and second roll bearing means extending therebetween,

each bellows stack having a first actuation means and a second actuation means extending parallel to each other,

a plurality of spaced first supports extending towards the second actuation means from the first actuation means,

a plurality of spaced second supports extending towards the first actuation means from the second actuation means,

said first supports extending between said second supports and alternating therewith,

a plurality of first and second bellows alternately mounted between said first and second supports to expand in a direction parallel to the first and second actuation means,

said first bellows having one end attached to the first support and the other end attached to an adjacent second support,

said second bellows having one end attached to a second support and the other end attached to an adjacent first support,

a first bearing attaching means connecting the first actuation means with the first roll bearing means,

a second bearing attaching means connecting the second actuation means with the second roll bearing means,

whereby when the first bellows are expanded the first actuation plate is moved in one direction and the second actuation plate is moved in the opposite direction to bend the first and second rolls in opposite directions and when the second bellows are expanded, the second actuation plate is moved in the one direction and the first actuation plate is moved in the opposite direction to bend the first and second rolls in opposite directions.

4. A calender stack having a first upper calender roll and a second lower adjacent calender roll journaled in main bearings in a calender support comprising:

first bearing means journaled to each end of the first roll and spaced from said main bearings,

second bearing means journaled to each end of the second roll and spaced from said main bearings,

two pairs of bellows stacks,

one pair of bellows stacks mounted at one end and the other pair mounted at the other end of the first and second rolls,

each pair of bellows stacks having two bellows stacks extending parallel to each other and having the first and second roll bearing means extending therebetween,

each bellows stack having a first actuation plate and a second actuation plate extending parallel to each other,

a plurality of spaced first supports extending towards the second actuation plate from the first actuation plate and being at right angles to the first actuation plate,

a plurality of spaced second supports extending towards the first actuation plate from the second actuation plate and being at right angles to the second actuation plate,

said first supports extending between said second supports and alternating therewith,

a plurality of first and second bellows mounted between said first and second supports to expand in a direction parallel to the first and second actuation plates,

said first bellows having one end attached to the undersurface of a first support and the other end attached to the upper surface of an adjacent second support,

said second bellows having one end attached to the undersurface of a second support and the other end attached to the upper surface of an adjacent first support,

a first attaching means connecting the first actuation plate with the first roll bearing means,

a second outboard bearing attaching means connecting the second actuation plate with second roll bearing means,

whereby when the first bellows are expanded, the first actuation plate is moved in one direction and the second actuation plate is moved in the opposite direction to bend the first and second rolls in opposite directions and when the second bellows are expanded, the second actuation plate is moved in the one direction and the first actuation plate is moved in the opposite direction to bend the first and second rolls in opposite directions.

5. A calender stack having a first upper calender roll and a second lower adjacent calender roll journaled in main bearings in a calender support comprising:

first outboard bearing means journaled to each end of the first roll and spaced from said main bearings,

second outboard bearings means journaled to each end of the second roll and spaced from said main bearings,

two pairs of bellows stacks,

one pair of bellows stacks mounted at one end and the other end mounted at the other end of the first and second rolls,

each pair of bellows stacks having two bellows stacks extending parallel to each other and having the first and second roll outboard bearings extending therebetween,

each bellows stack having a first actuation plate and a second actuation plate extending parallel to each other,

a plurality of spaced first supports extending towards the second actuation plate from the first actuation plate and being at right angles to the first actuation plate,

a plurality of spaced second supports extending towards the first actuation plate from the second actuation plate and being at right angles to the second actuation plate,

said first supports extending between said second supports and alternating therewith,

a plurality of first and second bellows mounted between said first and second supports,

said first and second bellows being mounted to expand in a direction parallel to the first and second actuation plates,

said first bellows having one end attached to the undersurface of a first support and the other end attached to the upper surface of an adjacent second support,

said second bellows having one end attached to the undersurface of a second support and the other end attached to the upper surface of an adjacent first support,

a first attaching means connecting the first actuation plate with the first roll outboard bearing,

a second attaching means connecting the second actuation plate with the second roll outboard bearing, whereby when the first bellows are expanded, the first actuation plate is moved in one direction and the second actuation plate is moved in the ather direction to bend the first and second rolls in opposite directions and when the second bellows are expanded, the second actuation plate is moved in the one direction and the first actuation plate is moved in the other direction to bend the first and second rolls in opposite directions.

6. A paper machine calender stack having a first upper calender roll and a second lower adjacent calender roll journaled in main bearings in a calender support cornrising:

first outboard bearing means journaled to each end of the first roll and spaced from said main bearings,

second outboard bearing means journaled to each end of the second roll and spaced from said main bearings,

two pairs of bellows stacks,

one pair of bellows stacks mounted at one end and the other pair mounted at the other end of the first and second rolls,

each pair of bellows stacks having two bellows stacks extending parallel to each other and having the first and second roll outboard bearing extending therebetween,

each bellows stack having a first actuation plate and a second actuation plate extending parallel to each other,

means to interconnect the first actuation plates of each pair of bellows stacks,

means to interconnect the second actuation plates of each pair of bellows stacks,

a plurality of spaced first horizontal supports extending towards the second actuation plate from the first actuation plate and being at right angles to the first actuation plate,

a plurality of spaced second horizontal supports extending towards the first actuation plate from the second actuation plate and being at right angles to the seond actuation plate,

said first supports extending between said second supports and alternating therewith,

a plurality of first and second bellows mounted between said first and second supports,

said first and second bellows being mounted to expand in a direction parallel to the first and second actuation plates,

said first bellows having one end attached to the undersurface of a first support and the other end attached to the upper surface of an adjacent second support,

said second bellows having one end attached to the undersurface of a second support and the other end attached to the upper surface of an adjacent first support,

a first outboard bearing attaching means extending from each first actuation plate,

said first attaching means mounted to the first roll outboard bearing,

a second outboard bearing attaching means extending from each second actuation plate,

said second attaching means being mounted to the second roll outgoard bearing,

whereby the expansion of the first bellows moves the first actuation plate upwards and the second actuation plate downwards to bend the first and second rolls in opposite directions and the expansion of the second bellows moves the second actuation plate upwards and the first actuation plate downwards to bend the first and second rolls in opposite directions.

7. A paper machine calender stack having a first upper calender roll yand a second lower adjacent calender roll journaled in main 'bearings in a calender support comprising:

`first outboard bearing means journaled to each end of the first roll and spaced from said main bearings,

second outboard bearing means journaled to each end of the se-cond roll and spaced from said main bearings,

two pairs of bellows stacks,

one pair of bellows stacks mounted at one end and the other pair mounted at the other end of the first and second rolls,

each pair of bellows stacks having two bellows stacks extending parallel to each other and having the first and second roll outboard bearings extending therebetween,

each bellows stack having a first actuation plate and a second -actuation plate extending vertically parallel to each other,

a plurality of spaced first horizontal supports extending towards the second actuation plate from the first actuation plate and 'being at right angles to the first actuation plate,

ya plurality of spaced second horizontal supports extending towards the first actuation plate from the second actuation plate and being at right angles to the second actuation plate,

said first supports extending between said second supports and alternating therewith,

a plurality of first and second vertical force exerting Abel-lows mounted between said first and second supports,

said first and second bellows being mounted to expand in a direction parallel to the first and second actuation plates,

said first bellows having one end attached to the undersurface of a first support and the other end attached to the upper surface of an adjacent second support,

said secon-d bellows having one end attached to the undersurface of a second support and the other end attached to the upper surface of an adjacent first support,

a first outboard bearing attaching means extending from each first actuation plate,

said first attaching means mounted to the rst roll outboard bearing,

a second outboard bearing attaching means extending from each second actuation plate,

said second attaching means being mounted to the second roll outboard bearing,

whereby when the first bellows are expanded the first actuation plate is moved upwards and the second actuation plate is moved downwards to bend the first and second rolls in opposite directions and when the second bellows are expanded, the second actuation plate is moved upwards and the first actuation plate is moved downwards to bend the first and second rolls in opposite directions.

8. A calender stack having a first calender roll and a Cil second adjacent calender roll journaled in main bearings in a calender support comprising:

first bearing means journaled to each end of the first roll and spaced from said main bearings,

second bearing means journaled to each end of the second roll and spaced from said mean bearings,

a pa-ir of swing arms connected to the first roll to pivot `the first roll towards and away from the second roll,

a lever arm connected to each swing arm to actuate the swing arm,

said lever arm having a portion thereof with two lever bellows connected to opposite sides thereof,

means to supply the lever bellows with pressurized fiuid to selectively expand the Ibellows to move the lever arm and thereby actuate the swing arm,

stop means attached to a pivot support to limit the movement of t-he lever arm,

lockup stop means attached to the pivot `support to lock the lever arm in a position whereby the first roll yis pivoted out of contact with the second roll,

a bellows stack mounted at each end of the first and second rolls,

said bellows stack having a first actuation means and a second actuation means extending parallel to each other,

at least one first support extending towards the second actuation means from the first actuation means,

at least one second support extending towards the first actuation means from the second actuation means,

at least one first and at least one second bellows mounted between said first and second supports to expand in a direction parallel to the first and second actuation means to move the first and second actuation means relative to each other,

said first bellows having one end attached to the undersurface of' a first support and the other end attached to the upper surface of an adjacent second supp-ort,

sai-d second bellows having one end attached to the undersurface of a second support and the other end attached to the upper surface of an adjacent first support,

a first attaching means connecting the first actuation means with the first roll bearing means,

a second attaching means connecting the second actuation means with the second roll bearing,

whereby when the first bellows is expanded the first actuation means is moved upwards and the second actuation means is moved downwards to bend the first and second rolls in opposite directions and when the second bellows is expanded, the second actuation means is moved upwards and the first actuation means is moved downwards to bend the first and second rolls in opposite directions.

9. A paper machine calender stack having a first upper calender roll and a second lower adjacent calender roll journaled in main bearings in a calender support comprising:

first outboard bearing means journaled to each end of the first roll and spaced from said main bearings,

second outboard bearing means journaled to each end of the secon-d roll and spaced from said main bearings,

a pair of swing arms connected to the main bearings of the first roll to pivot the first roll towards and away from the second roll, l

a lever arm connected to each swing arm to actuate the swing arm,

said lever arm having a portion thereof with two lever bellows connected to opposite sides thereof means to supply the lever bellows with pressurized fluid to selectively expand the bellows to move the lever arm and thereby actuate the swing arm,

stop means attached to a pivot support to limit the movement of the lever arm,

lll

lockup stop means attached to the pivot support to lock the lever arm in a posoition whereby the first roll is pivoted out of contact with the second roll,

two pairs of bellows stacks,

one pair of bellows stacks mounted at one end and the other pair mounted at the other end of the first and second rolls,

each pair of bellows stacks having two bellows stacks extending parallel to each other and having the first and second roll outboard bearings extending therebetween, each bellows stack having a first actuation plate and a second actuation plate extending vertically parallel to each other,

means to interconnect the first actuation plates of each pair of bellows stacks,

means to interconnect the second actuation plates of each pair of bellows stacks,

a plurality of spaced first horizontal supports extending towards the second actuation plate from the first actuation plate and being at right angles to the first acuation plate,

a plurality of spaced second horizontal supports extending towards the first actuation plate from the second actuation plate and being at right angles to the second actuation plate,

said first support extending between said second supports and alternating therewith,

a plurality of first and second vertical force exerting bellows mounted between said first and second supports,

said first and second bellows being mounted to expand in a direction parallel to the first and second actuation plates,

said first bellows having one end attached to the undersurface of a first support and the other end attached to the upper surface of an adjacent second support,

said second bellows having one end attached to the undersurface of a second support and the other end attached to the upper surface of an adjacent first support,

a first outboard bearing attaching means extending from each first actuation plate,

said first attaching means mounted to the first roll outboard bearing,

a second outboard bearing attaching means extending from each second actuation plate,

said second attaching means being mounted to the second roll outboard bearing,

whereby when the first bellows are expanded, the first actuation plate is moved upwards and the second actuation plate is moved downwards to bend the first and second rolls in opposite directions and when the second bellows are expanded, the second actuation plate is moved upwards and the first actuation plate is moved downwards to bend the first and second rolls in opposite directions.

10. A roll bending device comprising:

a bellows stack,

said bellows stack having a first actuation means and a second actuation means extending parallel to each other,

a plurality of spaced first supports extending towards the second actuation means from the first actuation means,

a plurality of spaced second supports extending towards the first actuation means from the second actuation means,

said first supports extending between said second supports and alternating therewith,

at least one first and at least one second force exerting bellows mounted between said rst and second supports to expand to move the first and second actuation means relative to each other,

said first bellows has one end attached to a first support and the other end attached to an adjacent second support,

said second bellows has one end attached to a second support and the other end attached to an adjacent first support,

a first roll bending attaching means connected to the first actuation means,

a second roll bending attaching means connected to the second actuation means,

whereby when the first bellows is expanded the first actuation means is moved upwards and the second actuation means is moved downwards and when the second bellows are expanded, the second actuation means is moved upwards and the first actuation means is moved downwards.

11. A roll bending devi-ce comprising:

a pair of bellows stacks,

each bellows stack having a first actuation plate and a second actuation plate,

a plurality of spaced first supports extending towards the second actuation plate from the rst actuation plate,

a plurality of spaced second supports extending towards the first actuation plate from the second actuation plate,

said first supports extending between said second supports and alternating therewith,

a plurality of first and second longitudinal force exerting bellows mounted between said first and second supports to expand in a direction parallel to the first and second actuation plates,

said first bellows having one end attached to the undersurface of a first support and the other end attached to the upper surface of an adjacent second support.

said second bellows having one end attached to the undersurface of a second support and the other end attached to the upper surface of an adjacent first support,

means to attach each first actuation plate to a first roll,

means to attach each second actuation plate to a second roll,

means to interconnect the first actuation plates of each bellows stack,

means to interconnect the second actuation plates of each bellows stack, and

whereby when the first bellows are expanded, the first actuation plate is moved in one direction and the second actuation plate is moved in the opposite direction and when the second bellows are expanded, the se-cond actuation plate is moved in the one direction and the first actuation plate is moved in the opposite direction.

12. A roll bending device comprising:

a pair `of bellows stacks,

each bellows stack extending parallel to one another,

each bellows stack having a first actuation plate and a second actuation plate extending parallel to each other,

means to interconnect the first actuation plates of each bellows stack,

means to interconnect the second actuation plates of each bellows stack,

a plurality of spaced first supports extending towards the second actuation plate from the first actuation plate and being at right angles to the first actuation plate,

a plurality of spaced second supports extending towards the first actuation plate from the second actuation plate and being at right angles to the second actuation plate,

said first supports extending between said second supports and alternating therewith,

a pluraliy of first and second longitudinal force exerting bellows mounted between said first and second supports to expand in a direction parallel to the first and second actuation plates,

said first bellows having one end attached to the undersurface of a first support and the other end attached to the upper surface of an adjacent second support,

said second bellows having one end attached to the undersurface of a second support and the other end attached to the upper surface of an adjacent first support,

a first bearing attaching means extending from each first actuation plate and adapted to be attached to a first roll,

a second bearing attaching means extending from each :second actuation plate and adapted to be attached to a second roll,

whereby when the first bellows are expanded, the first actuation plate is moved upwards and the second actuation plate is moved downwards and when the second bellows are expanded, the second actuation plate is moved upwards and the first actuation plate is moved downwards.

13. IIn combination,

a pair of cooperating rolls adapted to finish a sheet between the rolls,

journals on the ends of the rolls,

a pair of bearings on each journal,

means holding one of each pair of bearings stationary,

a roll bending device mounted at each end of the rolls,

said roll bending device having a first actuation means and a second actuation means extending parallel to each other,

at least one first support means extending from the first actuation means,

at least one second support means extending from the second -actuation means, v

a plurality of first and second force exerting means mounted between said first and second support means to exert a force in a direction'parallel to the first and second actuation means,

a first bearing attaching means connecting the first actuation means with the other of each pair of bearings on one roll,

a second bearing .attaching means connecting the second actuation means with the other of each pair of bearings of the other roll, 4and means to selectively actuate the first and second force exerting means whereby when the first force exerting means -is actuated, the first actuation means is moved in one direction and the second actuation means is moved in the opposite direction to bend the pair of rolls in opposite directions away from each other and when the second force exerting means is actuated, the second actuation means is moved in one direction and the first actuation means is moved in the opposite direction Ito bend lthe pair of rolls in opposite directions towards each other.

14. In combination,

a pair of lcooperating rolls adapted to finish a sheet between the rolls,

journals on the ends of the rolls,

a pair of bearings journalled at each end of each of said rolls,

means holding one of each pair of bearings stationary,

and

a roll bending device mounted at each end of the rolls,

each of said roll bending devices comprising,

a rfirst actuation means and a second actuation means extending parallel lto each other,

a pair of spaced first support means extending from the first actuation means,

a second support means extending from the second actuation means between said first support means,

a pair of force exerting means one of which is mounted between and interconnecting one of said first support means and said second support means and the other of which is mounted between and interconnecting the other of said first support means and said second `support means for exerting forces in directions parallel to said first and said second actuation means,

a first bearing attaching means connecting the first actuation means with the other of each pair of bearings on one roll,

a second bearing attaching means connecting the second actuation means with the other of each pair of bearings of the other roll, and means to independently and selectively actuate said force exerting means.

15. The invention as defined in claim 14 in which said force exerting means comprise pressurized fiuid operated bellows.

References Cited by the Examiner UNITED STATES PATENTS 2,611,150 9/52 Goulding 100-162 2,825,217 3/58 Byrd 100-162 3,044,440 7/ 62 Molsberry et al 100-170 X 3,060,843 10/62 Moore et al 100-170 X 3,105,377 10/ 63 Brenner et al 100-170 X FOREIGN PATENTS 747,347 4/ 5 6 Great Britain. 783,421 9/57 Great Britain.

WALTER A. SCHEEL, Primary Examiner.

LOUIS O. MAASSEL, Examiner. 

14. IN COMBINATION, A PAIR OF COOPERATING ROLLS ADAPTED TO FINISH A SHEET BETWEEN THE ROLLS, JOURNALS ON THE ENDS OF THE ROLLS, A PAIR OF BEARINGS JOURNALLED AT EACH END OF EACH OF SAID ROLLS, MEANS HOLDING ONE OF EACH PAIR OF BEARINGS STATIONARY, AND A ROLL BENDING DEVICE MOUNTED AT EACH END OF THE ROLLS, EACH OF SAID ROLL BENDING DEVICES COMPRISING, A FIRST ACTUATION MEANS AND A SECOND ACTUATION MEANS EXTENDING PARALLEL TO EACH OTHER, A PAIR OF SPACED FIRST SUPPORT MEANS EXTENDING FRM THE FIRST ACTUATION MEANS, A SECOND SUPPORT MEANS EXTENDING FROM THE SECOND ACTUATION MEANS BETWEEN SAID FIRST SUPPORT MEANS, A PAIR OF FORCE EXERTING MEANS ONE OF WHICH IS MOUNTED BETWEEN AND INTERCONNECTING ONE OF SAID FIRST SUPPORT MEANS AND SAID SECOND SUPPORT MEANS AND THE OTHER OF WHICH IS MOUNTED BETWEEN AND INTERCONNECTING THE OTHER OF SAID FIRST SUPPORT MEANS AND SAID SECOND SUPPORT MEANS FOR EXERTING FORCES IN DIRECTIONS PARALLEL TO SAID FIRST AND SAID SECOND ACTUATION MEANS, A FIRST BEARING ATTACHING MEANS CONNECTING THE FIRST ACTUATION MEANS WITH THE OTHER OF EACH PAIR OF BEARINGS ON ONE ROLL, A SECOND BEARING ATTACHING MEANS CONNECTING THE SECOND ACTUATION MEANS WITH THE OTHER OF EACH PAIR OF BEARINGS OF THE OTHER ROLL, AND MEANS TO INDEPENDENTLY AND SELECTIVELY ACTUATE SAID FORCE EXERTING MEANS. 